From patchwork Fri Apr 22 18:06:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 565990 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C69F1C4332F for ; Fri, 22 Apr 2022 18:10:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233195AbiDVSNj (ORCPT ); Fri, 22 Apr 2022 14:13:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40704 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238408AbiDVSJT (ORCPT ); Fri, 22 Apr 2022 14:09:19 -0400 Received: from relay11.mail.gandi.net (relay11.mail.gandi.net [217.70.178.231]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3DCE4120D13; Fri, 22 Apr 2022 11:06:25 -0700 (PDT) Received: (Authenticated sender: miquel.raynal@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 6DC0B10000A; Fri, 22 Apr 2022 18:06:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1650650783; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=6PKwEIeql6uYeuItC4CotOv1F8iaZ9GjXTTYBwTsneM=; b=h5bsfckoKQ1d1AqQc+yKwZhv0kAuWNVq9qfIxUnbWkVxUS4nYfCuYHhMDy0I7nLoZv5oe2 tcznYgMk8hrL0pMuQx4AYjK7Nz0iMtPiZ6d8Hvi2gDWnCQYxGxvYMv8WGDgTNvriXWHSSu lHtUdbm7t7eG5wTKPxTO3Idwbyc2j41IbyO+5u8oKXoa9jUJHNy721tXoJEcXqQHhcjgWQ XwycDdEel8qjtPA21fiRHO02//gBtdJLsjcBLzTAfy8gOS5FlnG8RypoTknOnu/S8lLimL xIm+/0Guy1WoDOq/DY+7H1Feab4XWG2H4Mzwwti2aZu76pXAsgS2JX5Zxu36Kg== From: Miquel Raynal To: Geert Uytterhoeven , Magnus Damm , Greg Kroah-Hartman , Jiri Slaby Cc: Miquel Raynal , Andy Shevchenko , linux-renesas-soc@vger.kernel.org, linux-serial@vger.kernel.org, Milan Stevanovic , Jimmy Lalande , Pascal Eberhard , Thomas Petazzoni , Herve Codina , Clement Leger , Ilpo Jarvinen Subject: [PATCH v7 3/9] serial: 8250: dw: Move the USR register to pdata Date: Fri, 22 Apr 2022 20:06:09 +0200 Message-Id: <20220422180615.9098-4-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220422180615.9098-1-miquel.raynal@bootlin.com> References: <20220422180615.9098-1-miquel.raynal@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org This offset is a good candidate to pdata's because it changes depending on the vendor implementation. Let's move the usr_reg entry from regular to pdata. This way we can drop initializing it at run time. Let's also use a define for it instead of defining only the default value. Suggested-by: Andy Shevchenko Signed-off-by: Miquel Raynal Reviewed-by: Andy Shevchenko --- drivers/tty/serial/8250/8250_dw.c | 11 ++++++++--- drivers/tty/serial/8250/8250_dwlib.h | 2 +- 2 files changed, 9 insertions(+), 4 deletions(-) diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index 7fdb2683f534..b34edc88af3d 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -35,6 +35,8 @@ /* Offsets for the DesignWare specific registers */ #define DW_UART_USR 0x1f /* UART Status Register */ +#define OCTEON_UART_USR 0x27 /* UART Status Register */ + /* DesignWare specific register fields */ #define DW_UART_MCR_SIRE BIT(6) @@ -251,7 +253,7 @@ static int dw8250_handle_irq(struct uart_port *p) if ((iir & UART_IIR_BUSY) == UART_IIR_BUSY) { /* Clear the USR */ - (void)p->serial_in(p, d->usr_reg); + (void)p->serial_in(p, d->pdata->usr_reg); return 1; } @@ -387,7 +389,6 @@ static void dw8250_quirks(struct uart_port *p, struct dw8250_data *data) p->serial_out = dw8250_serial_outq; p->flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_FIXED_TYPE; p->type = PORT_OCTEON; - data->usr_reg = 0x27; data->skip_autocfg = true; } #endif @@ -462,7 +463,6 @@ static int dw8250_probe(struct platform_device *pdev) return -ENOMEM; data->data.dma.fn = dw8250_fallback_dma_filter; - data->usr_reg = DW_UART_USR; data->pdata = device_get_match_data(p->dev); p->private_data = &data->data; @@ -681,20 +681,25 @@ static const struct dev_pm_ops dw8250_pm_ops = { }; static const struct dw8250_platform_data dw8250_dw_apb = { + .usr_reg = DW_UART_USR, }; static const struct dw8250_platform_data dw8250_octeon_3860_data = { + .usr_reg = OCTEON_UART_USR, .quirks = DW_UART_QUIRK_OCTEON, }; static const struct dw8250_platform_data dw8250_armada_38x_data = { + .usr_reg = DW_UART_USR, .quirks = DW_UART_QUIRK_ARMADA_38X, }; static const struct dw8250_platform_data dw8250_renesas_rzn1_data = { + .usr_reg = DW_UART_USR, }; static const struct dw8250_platform_data dw8250_starfive_jh7100_data = { + .usr_reg = DW_UART_USR, .quirks = DW_UART_QUIRK_SKIP_SET_RATE, }; diff --git a/drivers/tty/serial/8250/8250_dwlib.h b/drivers/tty/serial/8250/8250_dwlib.h index 68bb81bee660..0df6baa6eaee 100644 --- a/drivers/tty/serial/8250/8250_dwlib.h +++ b/drivers/tty/serial/8250/8250_dwlib.h @@ -22,6 +22,7 @@ struct dw8250_port_data { }; struct dw8250_platform_data { + u8 usr_reg; unsigned int quirks; }; @@ -29,7 +30,6 @@ struct dw8250_data { struct dw8250_port_data data; const struct dw8250_platform_data *pdata; - u8 usr_reg; int msr_mask_on; int msr_mask_off; struct clk *clk;